website: add documentation for category_key resource

website/docs/d/category_key.html.markdown

@@ -0,0 +1,48 @@
+---
+layout: "nutanix"
+page_title: "NUTANIX: nutanix_category_key"
+sidebar_current: "docs-nutanix-datasource-category-key"
+description: |-
+  Describe a Nutanix Category Key and its values (if it has them).
+---
+
+# nutanix_category_key
+
+Describe a Nutanix Category Key and its values (if it has them).
+
+## Example Usage
+
+```hcl
+resource "nutanix_category_key" "test_key_value"{
+    name = "data_source_category_key_test_values"
+    description = "Data Source CategoryKey Test with Values"
+}
+
+resource "nutanix_category_value" "test_value"{
+    name = "${nutanix_category_key.test_key_value.name}"
+    value = "test_category_value_data_source"
+    description = "Data Source CategoryValue Test with Values"
+}
+
+
+data "nutanix_category_key" "test_key_value" {
+    name = "${nutanix_category_key.test_key_value.name}"
+}
+```
+
+## Argument Reference
+
+The following arguments are supported:
+
+* `name`: - (Required) The name for the category key.
+
+## Attributes Reference
+
+The following attributes are exported:
+
+* `system_defined`: - Specifying whether its a system defined category.
+* `description`: - A description for category key.
+* `api_version` - The version of the API.
+* `values`: - A list of the values from this category key (if it has them).
+
+See detailed information in [Nutanix Image](https://nutanix.github.io/Automation/experimental/swagger-redoc-sandbox/#tag/category/paths/~1categories~1{name}/get).